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Potassium Fertilization in Rice–Wheat System across Northern India: Crop Performance and Soil Nutrients

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Title Potassium Fertilization in Rice–Wheat System across Northern India: Crop Performance and Soil Nutrients
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Creator Vinod K. Singh, Brahma S. Dwivedi, Roland J. Buresh, M. L. Jat, Kaushik Majumdar, Babooji Gangwar, Vidhi Govil, and Susheel K. Singh
 
Subject Potassium Fertilization, Rice–Wheat System, Northern India, Crop Performance and Soil Nutrients
 
Description Not Available
Rice (Oryza sativa L.)–wheat (Triticum aestivum L.) cropping in South Asia is under stress due to widespread removal of plant
nutrients in excess of their application. We evaluated K, S, and Zn application to rice and wheat in 60 farmer’s fi elds in fi ve
districts across northern India. We compared the existing farmer’s fertilizer practice (FFP), which in most cases did not include
application of K, S, or Zn, with application of K only, S + Zn, or K + S + Zn. Application of K increased rice yields by 0.6 to
1.2 Mg ha–1 and wheat yields by 0.2 to 0.7 Mg ha–1 across the locations varying in soil texture, soil K, climate, and irrigation.
Application of S and Zn with K further increased yields. Added net return from fertilization with only K, as compared to FFP,
ranged from U.S.$ 114 to 233 ha–1 for rice and U.S.$ 29 to 214 ha–1 for wheat. Added net return further increased when S and Zn
were combined with K. Total plant K per unit of grain yield was comparable for mature rice and wheat (22 kg Mg grain–1). Soil
exchangeable and non-exchangeable K decreased without K application during one rice–wheat cropping cycle. Rice and wheat
yields increased with application of K across the range in exchangeable soil K from 60 to 162 mg kg–1. Approaches are needed to
reliably predict fertilizer K requirements when crops respond relatively uniformly to K across a wide range in exchangeable K.
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Date 2018-12-03T05:53:41Z
2018-12-03T05:53:41Z
2013-01-01
 
Type Research Paper
 
Identifier Singh, V.K., B.S. Dwivedi, R.J. Buresh, M.L.Jat, K. Majumdar, B. Gangwar, V. Govil, S.K. Singh. 2013. Potassium fertilization in rice-wheat system on farmer’s fields in India: crop performance and soil nutrients. Agronomy Journal 105 (2): 1-11
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http://krishi.icar.gov.in/jspui/handle/123456789/15158
 
Language English
 
Relation Not Available;
 
Publisher American Society of Agronomy